<span [textContent] = "time | date: 'HH:mm:ss:SSS'"> </span>
<span [textContent] = "title"></span>
<p>
  child works!
</p>
<button (click) = "handleClick($event)">脏值检测</button>
<p #timeRef></p>
<p>{{time | date:'hh:mm:ss'}}</p>